Improvement in processes for obtaining isinglass



UNITED STATES PATENT OFFICE. v

IsAAc sTANwooD, 0F GLOUCESTER, MASSAGHUSETTS.

IMPROVEMENT 'IN PROCESSES FOR OBTAINING ISINGLASS.

Specification forming part of Letters Patent No. 177,764., dated May 23,1876; applicatiiin filed I March. 2, ,1876. 7

To all whom it may concern: Q i Be it known that I, ISAA STANWQOD, of

I Gloucester, in the county of Essex and State of Massachusetts,haveinvented a new and Im-.

proved Process for Obtaining-lsinglass and i I hereby declarejthefollowing to he a full, clear, and exact description thereof.

The object of my. invention is to-obtain from the skins of salt fish amarketable article of isinglass; and myinventioii'consists in certainsteps of a nature to constitute a process, as

. hereinafter more fully set forth and claimed. After the skins arestripped I soak them in .fresh water long enough to remove all the salt.I then dry. them without removing the scales. After" they are dried lboil them thoroughly, and carefully strain the liquid ofl' in tankswhere all the impurities will settle to the bottom, and the' whole will,after proper evaporation, become a solid mass. It is, then I taken fromthe tanks, the impurities are out I claim as new, and desire to secureby Letters Patent, is-

The process. herein described of producing isinglass from saltfish-skins consisting essentially in soaking them, drying them with Ithe scales on, decanting the liquorafter boiling, settling it in tanks,removing the impurities, and then drying in sheets suitable for themarket, as set forth.

ISAAC s'rAN ooD.

Witnesses EDWARD STANWOOD, CHAS. JACKSON.

